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Chapter 331: Floor 4.5
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Chapter 333: Annihilate in One Fell Swoop
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... organizations have a multitude of methods to construct secret rooms. While they hide underground, is it impossible to hide between floors?
No, quite the opposite, sometimes between floors is even more deceptive.
To the average person, a building stands there, with all its rooms connected, making it impossible for a "room to disappear into thin air." However, with clever design, a secret room can be completely hidden — invisible from inside and outside, breaking psychological conv ...
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